Device for controlling the cooling flows of gas turbines

Abstract

The inner barrel of a turbine has a plurality of holes for receiving compressor discharge air and flowing such air within the inner barrel. A plurality of replaceable nozzles having internal bores of different diameters are selectively screw threaded into the openings of the inner barrel body enabling, with different diameters, a variation in the flow of compressor discharge air entering the inner barrel.

What is claimed is:  
     
       1. A device for controlling the cooling flow of a gas turbine comprising: 
       a compressor having an inner barrel including a cylindrical body and a plurality of openings through the cylindrical body of the inner barrel in communication with compressor discharge air and flowing compressor discharge air into the inner barrel;  
       a plurality of replaceable nozzles having internal bores of different diameters relative to one another and mountable in said holes to enable a selective variation in the flow of compressor discharge air into the inner barrel in response to selection and replacement of one or more of said nozzles with one or more other nozzles respectively having internal bores of different diameter.  
     
     
       2. A device according to  claim 1  wherein each of said nozzles includes a threaded section for threaded engagement with a corresponding internally threaded section of a corresponding hole formed in the inner barrel body. 
     
     
       3. A device according to  claim 2  wherein each of said replaceable nozzles includes a cylindrical section having a diameter smaller than that of said externally threaded section of said nozzle. 
     
     
       4. A device according to  claim 2  wherein each of said replaceable nozzles has a pair of incisions for engagement with a magnetic head spanner. 
     
     
       5. A device according to  claim 1  including a guide tube and a magnetic head spanner, said compressor including an outer casing, said guide tube being receivable through a hole in said casing. 
     
     
       6. A device according to  claim 5  wherein said hole through said casing has female threads, said guide tube having a male threaded collar for threaded engagement with the female threaded hole of the casing. 
     
     
       7. A device according to  claim 6  wherein said guide tube is threaded into said hole of said casing and has a distal end for contact with the inner barrel body to form a retaining and guide channel, said nozzles being receivable through said channel for threaded engagement with the holes through the inner barrel body. 
     
     
       8. A device according to  claim 7  wherein said nozzles are staked to said inner barrel body by a dimpling punch received through said guide tube. 
     
     
       9. A device according to  claim 6  wherein during operation of the gas turbine, closure devices are mounted in said holes through said outer casing upon removal of said guide tube to close the outer casing holes.